60pcs 5 1/2' Trampoline Springs are ideal for replacing the worn out trampoline springs Compatible for most trampolines, with recommended distance between the trampolines frame and mat being 5 1/2' or larger Made of galvanized steel, it offers outstanding resistance to rust, corrosion and crack Slightly curve-shaped hooks offer high tensile strength and ensure stability for trampoline The spring helps to transfer energy slowly and gradually, resulting in high bounce feedback for your trampoline